Substitute

   The Subsitute flag ($$) is the only flag that must be used in
   pairs. When the flag is turned on, it causes either a date or
   a time to be output. The output is determined by the word you
   associate with the flag pair; for example, $$Date. See the output
   in the following example.

   When the Substitute flag is turned on, any dollar sign character
   ($), even if it is not paired, must be preceded by an Accept flag
   if it is to be taken as normal text by DSR.
 

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